CleaverBrooks CB780E User Manual

CB780E/CB784E RELAY MODULES WITH VALVE PROVING
750-234 11 32-00150—03
Fig. 7. Internal block diagram of the CB780E/CB784E (see Fig. 8–13 for detailed wiring instructions).
d. Remote Reset—Use no. 22 AWG or greater
twisted pair wire, insulated for low voltage; see
Fig. 11–13.
e. Communication Interface ControlBus Module—
For communications purposes, use an
unshielded 22 AWG 2-wire twisted cable if the
leadwire run and noise conditions permit or use a
Belden 8771 shielded cable or equivalent. The
Keyboard Display Module, DATA CONTROLBUS
MODULE™ (for remote mounting or communica-
tions) or Communication Interface ControlBus
Module must be wired in a daisy chain configu-
ration, (1(a)-1(a), 2(b)-2(b), 3(c)-3(c)). The order
of interconnection of all the devices listed above
is not important. Be aware that modules on the
closest and farthest end of the daisy chain con-
figuration string require a 120 ohm (1/4 watt
M28586A
CONFIGURATION
JUMPERS
MICROCOMPUTER
RESET
PUSHBUTTON
RUN/TEST
SWITCH
STATUS LEDs
PLUG-IN PURGE
TIMER CARD
SAFETY RELAY
CIRCUIT
POWER SUPPLY
KEYBOARD
DISPLAY MODULE
HIGH FIRE
COMMON
MODULATE
LOW FIRE
HIGH FIRE SWITCH
PLUG-IN
FLAME
AMPLIFIER
RELAY
DRIVE
CIRCUIT
CONTROL
POWER
TEST
JACK
REMOTE
RESET
DDL
DDL
COMMUNICATIONS
INDICATES FEEDBACK SENSING
TO RELAY STATUS FEEDBACK
AND LINE VOLT INPUTS
FIELD WIRING
INTERNAL WIRING
IGNITION
PILOT
PILOT/V2
MAIN VALVE
1K
9K
RELAY
STATUS
FEEDBACK
AND LINE
VOLTAGE
INPUTS
LIMITS CONTROLLER
LOCKOUT
INTERLOCK
PRE-IGNITION
INTERLOCK
1K1 2K1 5K1
8K1
8K2
9K1
9K2
120 Vac
FLAME SIGNAL
TEST
LOW FIRE SWITCH
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
DEDICATED DATA LINK.
RS485
1
2
3
L1
(HOT)
L2
4
6
20
7
4K1
7K1
2K2
10
8
21
9
18
19
8K
7K
6K
5K
4K
3K
2K
F
G
22
1
BLOWER
6K1
5
ALARM
3K1
3
L2
12
13
15
14
2
2
1

CleaverBrooks CB780E Specifications

General

Brand	CleaverBrooks
Model	CB780E
Category	Control Unit
Language	English